Datasheet LT3045 (Analog Devices) - 4
| 制造商 | Analog Devices |
| 描述 | 20V, 500mA, Ultralow Noise, Ultrahigh PSRR Linear Regulator |
| 页数 / 页 | 32 / 4 — ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply … |
| 修订版 | B |
| 文件格式/大小 | PDF / 2.9 Mb |
| 文件语言 | 英语 |
ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply over the full operating
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LT3045
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. PARAMETER CONDITIONS MIN TYP MAX UNITS
EN/UV Pin Current VEN/UV = 0V, VIN = 20V l ±1 µA VEN/UV = 1.24V, VIN = 20V 0.03 µA VEN/UV = 20V, VIN = 0V l 8 15 µA Quiescent Current in VIN = 6V 0.3 1 µA Shutdown (VEN/UV = 0V) TJ ≤ 125°C (E/I-Grade) l 10 µA TJ ≤ 150°C (H-/MP-Grade) l 20 µA Internal Current Limit VIN = 2V, VOUT = 0V l 570 710 850 mA (Note 12) VIN = 12V, VOUT = 0V 700 mA VIN = 20V, VOUT = 0V l 230 330 430 mA Programmable Programming Scale Factor: 2V < VIN < 20V (Note 11) 150 mA • kΩ Current Limit VIN = 2V, VOUT = 0V, RILIM = 300Ω l 450 500 550 mA VIN = 2V, VOUT = 0V, RILIM = 1.5kΩ l 90 100 110 mA PGFB Trip Point PGFB Trip Point Rising l 291 300 309 mV PGFB Hysteresis PGFB Trip Point Hysteresis 7 mV PGFB Pin Current VIN = 2V, VPGFB = 300mV 25 nA PG Output Low Voltage IPG = 100µA l 30 100 mV PG Leakage Current VPG = 20V l 1 µA Reverse Input Current VIN = –20V, VEN/UV = 0V, VOUT = 0V, VSET = 0V l 100 µA Reverse Output Current VIN = 0, VOUT = 5V, SET = Open 14 25 µA Minimum Load Required VOUT < 1V l 10 µA (Note 13) Thermal Shutdown TJ Rising 165 °C Hysteresis 8 °C Start-Up Time VOUT(NOM) = 5V, ILOAD = 500mA, CSET = 0.47µF, VIN = 6V, VPGFB = 6V 55 ms VOUT(NOM) = 5V, ILOAD = 500mA, CSET = 4.7µF, VIN = 6V, VPGFB = 6V 550 ms VOUT(NOM) = 5V, ILOAD = 500mA, CSET = 4.7µF, VIN = 6V, RPG1 = 50kΩ, 10 ms RPG2 = 700kΩ (with Fast Start-Up to 90% of VOUT) Thermal Regulation 10ms Pulse –0.01 %/W
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
guarantee maximum dropout voltage specifications at high currents
may cause permanent damage to the device. Exposure to any Absolute
due to production test limitations with Kelvin-sensing the package
Maximum Rating condition for extended periods may affect device
pins.
Please consult the Typical Performance Characteristics for curves reliability and lifetime. of dropout voltage as a function of output load current and temperature
Note 2:
The EN/UV pin threshold must be met to ensure device operation. measured in a typical application circuit.
Note 3:
Maximum junction temperature limits operating conditions. The
Note 6:
GND pin current is tested with VIN = VOUT(NOMINAL) and a current regulated output voltage specification does not apply for all possible source load. Therefore, the device is tested while operating in dropout. This combinations of input voltage and output current, especially due to the is the worst-case GND pin current. GND pin current decreases at higher internal current limit foldback which starts to decrease current limit at input voltages. Note that GND pin current does not include SET pin or ILIM V pin current but Quiescent current does include them. IN – VOUT > 12V. If operating at maximum output current, limit the input voltage range. If operating at the maximum input voltage, limit the output
Note 7:
SET and OUTS pins are clamped using diodes and two 25Ω series current range. resistors. For less than 5ms transients, this clamp circuitry can carry
Note 4:
OUTS ties directly to OUT. more than the rated current. Refer to Applications Information for more
Note 5:
Dropout voltage is the minimum input-to-output differential information. voltage needed to maintain regulation at a specified output current. The
Note 8:
Adding a capacitor across the SET pin resistor decreases output dropout voltage is measured when output is 1% out of regulation. This voltage noise. Adding this capacitor bypasses the SET pin resistor’s definition results in a higher dropout voltage compared to hard dropout thermal noise as well as the reference current’s noise. The output noise — which is measured when V then equals the error amplifier noise. Use of a SET pin bypass capacitor IN = VOUT(NOMINAL). For lower output voltages, below 1.5V, dropout voltage is limited by the minimum input also increases start-up time. voltage specification.
For DFN package: Linear Technology is unable to
Rev. B 4 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. PARAMETER CONDITIONS MIN TYP MAX UNITS
EN/UV Pin Current VEN/UV = 0V, VIN = 20V l ±1 µA VEN/UV = 1.24V, VIN = 20V 0.03 µA VEN/UV = 20V, VIN = 0V l 8 15 µA Quiescent Current in VIN = 6V 0.3 1 µA Shutdown (VEN/UV = 0V) TJ ≤ 125°C (E/I-Grade) l 10 µA TJ ≤ 150°C (H-/MP-Grade) l 20 µA Internal Current Limit VIN = 2V, VOUT = 0V l 570 710 850 mA (Note 12) VIN = 12V, VOUT = 0V 700 mA VIN = 20V, VOUT = 0V l 230 330 430 mA Programmable Programming Scale Factor: 2V < VIN < 20V (Note 11) 150 mA • kΩ Current Limit VIN = 2V, VOUT = 0V, RILIM = 300Ω l 450 500 550 mA VIN = 2V, VOUT = 0V, RILIM = 1.5kΩ l 90 100 110 mA PGFB Trip Point PGFB Trip Point Rising l 291 300 309 mV PGFB Hysteresis PGFB Trip Point Hysteresis 7 mV PGFB Pin Current VIN = 2V, VPGFB = 300mV 25 nA PG Output Low Voltage IPG = 100µA l 30 100 mV PG Leakage Current VPG = 20V l 1 µA Reverse Input Current VIN = –20V, VEN/UV = 0V, VOUT = 0V, VSET = 0V l 100 µA Reverse Output Current VIN = 0, VOUT = 5V, SET = Open 14 25 µA Minimum Load Required VOUT < 1V l 10 µA (Note 13) Thermal Shutdown TJ Rising 165 °C Hysteresis 8 °C Start-Up Time VOUT(NOM) = 5V, ILOAD = 500mA, CSET = 0.47µF, VIN = 6V, VPGFB = 6V 55 ms VOUT(NOM) = 5V, ILOAD = 500mA, CSET = 4.7µF, VIN = 6V, VPGFB = 6V 550 ms VOUT(NOM) = 5V, ILOAD = 500mA, CSET = 4.7µF, VIN = 6V, RPG1 = 50kΩ, 10 ms RPG2 = 700kΩ (with Fast Start-Up to 90% of VOUT) Thermal Regulation 10ms Pulse –0.01 %/W
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
guarantee maximum dropout voltage specifications at high currents
may cause permanent damage to the device. Exposure to any Absolute
due to production test limitations with Kelvin-sensing the package
Maximum Rating condition for extended periods may affect device
pins.
Please consult the Typical Performance Characteristics for curves reliability and lifetime. of dropout voltage as a function of output load current and temperature
Note 2:
The EN/UV pin threshold must be met to ensure device operation. measured in a typical application circuit.
Note 3:
Maximum junction temperature limits operating conditions. The
Note 6:
GND pin current is tested with VIN = VOUT(NOMINAL) and a current regulated output voltage specification does not apply for all possible source load. Therefore, the device is tested while operating in dropout. This combinations of input voltage and output current, especially due to the is the worst-case GND pin current. GND pin current decreases at higher internal current limit foldback which starts to decrease current limit at input voltages. Note that GND pin current does not include SET pin or ILIM V pin current but Quiescent current does include them. IN – VOUT > 12V. If operating at maximum output current, limit the input voltage range. If operating at the maximum input voltage, limit the output
Note 7:
SET and OUTS pins are clamped using diodes and two 25Ω series current range. resistors. For less than 5ms transients, this clamp circuitry can carry
Note 4:
OUTS ties directly to OUT. more than the rated current. Refer to Applications Information for more
Note 5:
Dropout voltage is the minimum input-to-output differential information. voltage needed to maintain regulation at a specified output current. The
Note 8:
Adding a capacitor across the SET pin resistor decreases output dropout voltage is measured when output is 1% out of regulation. This voltage noise. Adding this capacitor bypasses the SET pin resistor’s definition results in a higher dropout voltage compared to hard dropout thermal noise as well as the reference current’s noise. The output noise — which is measured when V then equals the error amplifier noise. Use of a SET pin bypass capacitor IN = VOUT(NOMINAL). For lower output voltages, below 1.5V, dropout voltage is limited by the minimum input also increases start-up time. voltage specification.
For DFN package: Linear Technology is unable to
Rev. B 4 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Application Related Parts